/*
 * Copyright (c) 2004-2022, University of Oslo
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * Redistributions of source code must retain the above copyright notice, this
 * list of conditions and the following disclaimer.
 *
 * Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 * Neither the name of the HISP project nor the names of its contributors may
 * be used to endorse or promote products derived from this software without
 * specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package org.hisp.dhis.i18n.ui;

import static com.google.common.base.Preconditions.checkNotNull;

import java.util.Locale;
import java.util.ResourceBundle;
import org.hisp.dhis.i18n.I18n;
import org.hisp.dhis.i18n.I18nFormat;
import org.hisp.dhis.i18n.I18nManager;
import org.hisp.dhis.i18n.locale.LocaleManager;
import org.hisp.dhis.i18n.ui.resourcebundle.ResourceBundleManager;
import org.hisp.dhis.i18n.ui.resourcebundle.ResourceBundleManagerException;
import org.springframework.stereotype.Component;

/**
 * @author Pham Thi Thuy
 * @author Nguyen Dang Quang
 */
@Component("org.hisp.dhis.i18n.I18nManager")
public class DefaultI18nManager implements I18nManager {
  // -------------------------------------------------------------------------
  // Dependencies
  // -------------------------------------------------------------------------

  private final ResourceBundleManager resourceBundleManager;

  private final LocaleManager localeManager;

  public DefaultI18nManager(
      ResourceBundleManager resourceBundleManager, LocaleManager localeManager) {
    checkNotNull(resourceBundleManager);
    checkNotNull(localeManager);

    this.resourceBundleManager = resourceBundleManager;
    this.localeManager = localeManager;
  }

  // -------------------------------------------------------------------------
  // I18nManager implementation
  // -------------------------------------------------------------------------

  @Override
  public I18n getI18n() {
    Locale locale = getCurrentLocale();

    return new I18n(getGlobalResourceBundle(locale), null);
  }

  @Override
  public I18n getI18n(Locale locale) {
    return new I18n(getGlobalResourceBundle(locale), null);
  }

  @Override
  public I18n getI18n(Class<?> clazz) {
    return new I18n(getGlobalResourceBundle(), getSpecificResourceBundle(clazz.getName()));
  }

  @Override
  public I18n getI18n(Class<?> clazz, Locale locale) {
    return new I18n(
        getGlobalResourceBundle(locale), getSpecificResourceBundle(clazz.getName(), locale));
  }

  @Override
  public I18n getI18n(String clazzName) {
    return new I18n(getGlobalResourceBundle(), getSpecificResourceBundle(clazzName));
  }

  @Override
  public I18nFormat getI18nFormat() {
    I18nFormat formatter = new I18nFormat(getGlobalResourceBundle());

    formatter.init();

    return formatter;
  }

  // -------------------------------------------------------------------------
  // Support methods
  // -------------------------------------------------------------------------

  private ResourceBundle getGlobalResourceBundle() {
    return getGlobalResourceBundle(getCurrentLocale());
  }

  private ResourceBundle getGlobalResourceBundle(Locale locale) {
    try {
      return resourceBundleManager.getGlobalResourceBundle(locale);
    } catch (ResourceBundleManagerException e) {
      throw new RuntimeException("Failed to get global resource bundle", e);
    }
  }

  private ResourceBundle getSpecificResourceBundle(String clazzName) {
    return resourceBundleManager.getSpecificResourceBundle(clazzName, getCurrentLocale());
  }

  private ResourceBundle getSpecificResourceBundle(String clazzName, Locale locale) {
    return resourceBundleManager.getSpecificResourceBundle(clazzName, locale);
  }

  private Locale getCurrentLocale() {
    return localeManager.getCurrentLocale();
  }
}
